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1
Turbulent Mixing of Chemical Elements in Galaxies
3.3.2 Episodic Infall One possibility to reconcile the infall models with the
observed scatter is that the infall is episodic and we are presently in a lull
between infall bursts. In this case, infall gas from last burst might have already
been mixed and ...
2
Accretion Processes in Star Formation
The infall velocity thus approaches the surface escape velocity when Rm » R,.
Figure 6.7 shows a sample of Ha line profiles for T Tauri stars. One notes that the
emission lines are quite wide, with velocities typically ~ +200 km s~1 from line ...
3
Protostars and Planets V
Rotational velocity (left) and infall velocity (right) are plotted as a function of
radius (from Belloche et al., 2002). The inner part of the envelope is rapidly
collapsing and rotating, while the outer part undergoes only moderate infall and
slower ...
Bo Reipurth, David Jewitt, Klaus Keil, 2007
4
Materia Oscura Nell'universo
A re-analysis of the Aaronson et al. data by Kraan-Korteweg [24] favored lower
values of the Virgocentric infall, of about 200 kms~'. Using the relative distance
moduli of Virgo and nearby clusters, Jerjen and Tammann [25] obtained a
Hubble ...
Silvio Bonometto, Joel R. Primack, Antonello Provenzale, 1996
5
Molecules in Astrophysics: Probes and Processes
1996 Wang et al. 1995 Ward-Thompson et al. 1996 Gregersen et al. 1996 4.
Complications So far, we have presented observations which are consistent with
detecting infall. Real clouds show motions such as turbulence, rotation, and
outflow.
International Astronomical Union. Symposium, Ewine F. van Dishoeck, 1997
6
The Chemical Evolution of the Galaxy
the most common parametrizations adopted in the literature for the infall rate (
usually expressed in terms of surface gas density): • constant in space and time,
which is obviously not very realistic, • exponentially decreasing in time and
constant ...
Francesca Matteucci, 2003
7
Diffuse Matter from Star Forming Regions to Active Galaxies: ...
The classic signature of infall is that of an optically thick line that is double-
peaked with a “blue” wing that is stronger than the “red” (Zhou 1992), together
with an optically thin single-peaked line of a higher transition or of a rarer
isotopomer.
T. W. Hartquist, Julian Mark Pittard, Samuel A. E. G. Falle, 2007
8
Chemical Evolution of Galaxies
2.15 Various infall laws for the Milky Way. The dark matter halos were selected by
assuming a mass between 5 1011 and 5 1012Mˇ. In the top left panel is shown
the two-infall law for gas accretion (continuous line): the first infall episode is ...
Francesca Matteucci, 2012
9
Outskirts of Galaxy Clusters (IAU C195): Intense Life in the ...
The so-called .triple- value' region (Tonry and Davis 1981) around a cluster
provides a signature of infall that depends on the mass of the cluster. Theoretical
models demonstrate the properties of infall in 3-dimensions (Bertschinger 1985).
10
The Origin of Stars and Planetary Systems
Since then the case for infall in cores with embedded candidate protostars has
strengthened, through the survey work of Gregersen et al (1997) and Mardones
et al (1997). 5.2. INFALL ASYMMETRY IN STARLESS CORES "Starless" cores
are ...
Charles J. Lada, N.D. Kylafis, 1999
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «INFALL»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
infall w wiadomościach.
Colorado astronomer explains the strange dust hanging above the …
The dust cloud is generated by the infall of micrometeoroids onto the surface, which in turn kick up a lot of dust, even to high altitudes. We did ... «State Column, Lip 15»
Charleys tant på Gunnebo sommarteater
Med sina infall sätter han ibland medspelarna i gungning. Jan Malmsjö, som även får använda sin dramatiska excellens och ta ut det teatrala ... «Göteborgs-Posten, Lip 15»
If Earth hit the surface of a black hole 'it would become a hologram …
In the paper, he wrote: "Even though the infalling object must stop at the fuzzball surface, the dynamics of the impact could mimic infall through ... «International Business Times UK, Cze 15»
Rare Quadruple Quasar: Black Holes Blew Astronomers Minds …
Quasars constitute a brief phase of galaxy evolution, powered by the infall of matter onto a supermassive black hole at the center of a galaxy. «Headlines & Global News, Maj 15»
The cosmic evolution of galaxies
... finding the most useful definition for the mass ratio of the merging galaxies and constraining the epoch of mass infall during a collision. «Phys.Org, Maj 15»
Dark matter interaction with itself is 'tiny-but-not-zero' (Includes …
He further says: "Such offsets are not seen in field galaxies, but are predicted during the long infall [the merge] to a cluster, if dark matter ... «Digital Journal, Maj 15»
Messenger Crashes, Its Results Endure
She and her colleagues first estimated that the infall of comets and cometary dust over the past 200 million years could have infused the top ... «Sky & Telescope, Maj 15»
Imaging a supernova with neutrinos
... patterns of emission during the star's infall, accretion of matter, and then post-supernova cooling. Black hole formation would create a sudden ... «Ars Technica, Mar 15»
No Such Thing as a Black Hole?
In Mersini-Houghton's analysis, the resulting energy and opposing pressure become so intense that it stops the infall, reverses it, and flings ... «Discover Magazine, Lut 15»
Black hole chokes on a swallowed star
... stellar matter was generating so much radiation that it pushed back on the infall. The black hole was choking on the rapidly infalling matter. «Astronomy Magazine, Sty 15»
